Burnishing-machine



R. 0. GRANT. BURNISHING MACHINE.

APPLICATION FILED APR-12, I920.

Patentd Feb. 15, 192.1;

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R. I]. GRANT.

BURNISHING MACHINE, APPLICATION FILED APR. 12. 1920.

mm Feb. 15 1921,,

2 SHEETS-SHEET 2.

ROSW'ELL 1). GRANT, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE PYLE-NATIONAL COMPANY, OF CHICAGO. ILLINOIS, A CORPORATION OF NEW JERSEY.

BURNISHING-MACHINE.

Specification of Letters Patent.

Patented Feb. 15, 1921.

Application filed. April 12, 1920. Serial No. 373,053.

T 0 all whom it may concern: 7

Be it known that I, RosWnLL D. GRANT, a citizen of the United States, residing at Chicage in the county of Cook and State of Illin0is,-have invented a certain new and useful Improvement in Burnishing-Machines, of which the following is a specification.

My invention relates to a burnishing machine and has for one object to provide a mechanism which will polish and burnish reflectors which are desi heel for use in headlights and the like. sinother object of my invention is to provide a mechanism which may be used to burnish the interior of cup shaped articles ingeneral. Other objects will appear from time to time throughout the specification and claims .of my invention wherein:

Figure 1 is a side elevation with parts in section and parts broken away;

Fig. 2 is a vertical section on line 2-2 of Fig. 1;

Fig. 3 is a vertical section along theline 3-3 of Fig. 1.

Like parts are designated by like characters throughout.

A is a supporting table or frame having the supporting legs A A Upon it is mounted the frame A near the top of which are secured the are shaped supporting members A A On them are mounted the lateral carrying members A A. A A are horizontal supporting arms which are secured to the lateral members A A B is a driving shaft mounted in the upper endof the frames A A B is a'pulley upon it adapted to be driven by the belt B from any suitable source of power not here shown.

B is a crank disk secured to one end of the shaft B. B is an eccentric secured at the.

other-end of the shaft B; B is a reach rod fastened to the eccentric l3 and hav ng pivoted at its lowerend a lever B which is also mounted for rotation on. the second- C C in mesh with the worms C C which are mounted at the lower ends of the shafts C 6*. The shafts C C are suitably supported in bearings C C which carry in their upper ends supporting frames 0 C adapted to carry the reflectors D D which. may be secured in them by the clamps D D. By means of the motion imparted by the shaft C and through the worms to the shafts C the carrying frames with the reflectors mounted in them are slowly rotated.

E E are shafts mounted in opposite ends of the machine. Each has fixed upon it the crank arm E which are connected by means of the reach rod E to the crank disk By means of the movement of said crank disk each of said shafts E E is caused to oscillate. F F are crank arms mounted adjacent the ends of the shafts E E and adapted to oscillate with it. In each of them is adjustably mounted a supporting member F in which is adjustably mounted a carrying rod F In the forward. end of said carrying rods F 2 is mounted the polishing tool F 3 which has the polishing point or surface F which may be made of bloodstone or any suitable polishing material. Attached to the rods F F are the connecting rods F F mounted for oscillation to the members A A. The rods are surrounded by the coilv springs F F by means of which they hold the polishing tool in contact with the surface to be polished.

In conjunction with the crank arms F F are clutches G G by means of which the. arms may be caused to oscillate with the shaft E or may be thrown out of operation at the will of the operator. The clutch controlling member G is secured to the shaft G which is carried in anysuitable hearing as for example C G Keyed to the shaft G is the controlling handle G which is pivoted on the table A at G Any suitable arrangement not here shown may be used to hold this controlling handle in the position in which the operator wishes to have it.

II H are trays-beneath the reflectors. To them are connected the troughs H H which extend upward beneath the reflectors and carrying frames. During the burnishing process it is often desirable to apply a lubricant to thesurface of the reflector and it is Although I have shown in my drawings an operative form of my invention, still it will be obvious that many changes both in form, size and relation of parts might be made without departing from the spirit of my invention. I wish therefore that my drawings be taken in a sense diagram matic.

The use and operation of my invention are as follows: 7

Reflectors or the like to be burnished are secured in the carrying frames by means of the clamps. The polishing or burnishing tools are then positioned with the working surface of the tool in contact with the face of therefiector. The machine is then put in operation and the carrying frame with the reflectors are slowly rotated step by step through the ratchet and pawl. At the same time the burnishing tool is moved back and forth across the surface of'the reflector from the center to the edge. In this manner every part of. the'surfaceis progressively brought in contact'with the burnishing tool and is thus burnished' During this process any suitable lubricant may be applied to the surface ofthe reflector in the usual manner. Claims: l 1. In a burnishing machine, a work holding frame mounted for rotation, means for rotating it step by step and a burnishing tool adapted to oscillate across the surface of the work during said rotation. V

2. In a burnishing machine, a work holding frame mounted for rotation, means for rotating it step by step, said means including a'ratchet and pawl, a burnishing tool adapted to oscillate across the surface of the work during said rotation, and means for oscillat ing said burnishing tool.-

3. In a burnishing machine, a work holding frame mounted for rotation, means for rotating itstep by step, said means including a ratchet and pawl, a burnishing tool adapt.- ed to oscillate across the surface of the work during said rotation, and means for oscillating said burnishing tool, a unit driving means adapted to operate said. tool and to rotate said work holding frame.

'41. In a burnishing machine, a work holding frame mounted for rotation, means for.

rotating saidframe step by step, said means comprlslng a drlven shaft, a second shaft,

7 means for driving said second shaft, step by step, said means including a ratchet and pawl, worms on said second shaft, worms connected to said holding frame and adapted to cause said frame to rotate in response to the rotation, of said second shaft. 7

5. In a burnishing machine, a work holding frame mounted for rotation, means for rotating it step by step and a burnishing tool adapted to oscillate across the surface of thework during said rotation, means for oscillating tool comprising a driven shaft, a crank disk on said shaft, a shaft mounted for oscillation, a'crank arm on said shaft and connected to said crank disk, ad ditional crank arms on said shaft, a'tool carrying member adjustably mounted in said arms, a burnishing tool mounted in the end of said arms, including spring controlled means for supporting said tool holding arm and for holding said tool in contact with said worms. r

6. In a burnishing machine, a workholding frame mounted for rotation, means for rotating it step by'step, said means including an'eccentric, a ratchet and pawha burnish-j ing tool adapted to oscillate across-the surface of the work during the rotation of said frame and means for oscillating said burnishing tool. 5 f r 1 7. In a burnishing machine, a plurality of work holding frames mounted for rotation, means for rotating them step by step, a plurality of burnishin tools adapted to'oscit, late across the surface of the work during the rotation, of said frames and means for oscillating said burnishing tools. V

8. In a burnishing machine, a plurality of work holding frames mounted for rotation,

means for rotating them step by step, a plurality of adjustably mounted burnishing tools adapted to oscillate across the surface of the work during the rotation 'ofsaid frames and means for oscillating said burnishing tools. j V

9. In a burnishing machine, a plurality of workholding frames mounted'for rotation, means for rotating them step by step, a'plurality of adjustably mounted; 'burnishing tools in unison.

11. In a burnishing machine, a plurality of work holding frames'mounted' forrotation, means for rotating them step by step, a plurality of burnishing tool's adapted to oscillateacross the surface of the work dur-f ing the rotation of said frames, means for oscillating said burnishing tools, means for rotating said frames and operating said tools-in unison, and means for throwing out of operation one ormore of said tools at the I V will of the operator. I V a 12. In a burnishing machine, a plurality of work holding frames mounted for rotation, means forl rotating. them step by step,

a plurality of burnishing tools adapted to oscillate across the surface of the work during the rotation of said frames, means for oscillating said burnishing tools, means for rotating said frames and operating said tools in unison and means for varying the speed of rotation of said work carrying frames.

13. In a burnishing machine, a plurality of work holding frames mounted for rotation, means for rotating them step by step, a plurality of burnishing tools adapted to oscillate across the surface ofthe work during the rotation of said frames, means for oscillating said burnishing tools, means for rotating said frames and operating said tools in unison, means for throwing out of operation one or more of said'tools at the will of the operator and means forvarying the speed of rotation of said work carrying frames.

14. In a burnishing machine, a work holding frame mounted for rotation, means for rotating it step by step, and a burnishing tool adapted to, oscillate across the surface of the work during said rotation, and adapted to make an excursion across the surface of said work between each step in the rotation of the work.

15. In a burnishing machine, a Work holding frame mounted for rotation, means for rotating it stop by" step, and a burnishing tool adapted to oscillate across the surface of the work, making an excursion in one direction between each step of the rotation of said work, and an excursion in the opposite direction during such step.

Signed at Chicago, county of Cook and State of Illinois, this 30th day of March,

ROSWELL D. GRANT. 

